Analysis

  • max time kernel
    77s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/10/2022, 16:14

General

  • Target
    Document.exe
  • Size 846KB
  • Sample221007-tpm98sdafn
  • SHA256 399068c4de8ddeb1172fcb35d13ba85550b99f322991bdf6e19c911f6436b60d
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • harvard.zapto.org:2404

  • nonprofit2.webredirect.org:2404

  • nonprofit.mywire.org:2404

  • harvard2.zapto.org:2404

  • nonprofit2.mywire.org:2404

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    dfcvdvafr-PAGQB6

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

  • take_screenshot_title

    notepad;solitaire;

Signatures

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • ModiLoader Second Stage 64 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Program crash 1 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Document.exe
    "C:\Users\Admin\AppData\Local\Temp\Document.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1004
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Libraries\RnwhbfhiO.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1868
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
        3⤵
          PID:4232
        • C:\Windows\SysWOW64\xcopy.exe
          xcopy "easinvoker.exe" "C:\Windows \System32\" /K /D /H /Y
          3⤵
          • Enumerates system info in registry
          PID:4360
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
          3⤵
            PID:1684
          • C:\Windows\SysWOW64\xcopy.exe
            xcopy "netutils.dll" "C:\Windows \System32\" /K /D /H /Y
            3⤵
            • Enumerates system info in registry
            PID:2592
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
            3⤵
              PID:4144
            • C:\Windows\SysWOW64\xcopy.exe
              xcopy "KDECO.bat" "C:\Windows \System32\" /K /D /H /Y
              3⤵
              • Enumerates system info in registry
              PID:1900
            • C:\Windows \System32\easinvoker.exe
              "C:\Windows \System32\easinvoker.exe"
              3⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Suspicious use of WriteProcessMemory
              PID:4440
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:3424
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  powershell -WindowStyle Hidden -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                  5⤵
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:4012
            • C:\Windows\SysWOW64\PING.EXE
              ping 127.0.0.1 -n 6
              3⤵
              • Runs ping.exe
              PID:3832
          • C:\Windows\SysWOW64\colorcpl.exe
            C:\Windows\System32\colorcpl.exe
            2⤵
              PID:1688
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1688 -s 1072
                3⤵
                • Program crash
                PID:2316
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1688 -ip 1688
            1⤵
              PID:2372

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  KDECO.bat

                  • Path C:\Users\Public\Libraries\KDECO.bat
                  • Size 155B
                  • SHA256 37c59c8398279916cfce45f8c5e3431058248f5e3bef4d9f5c0f44a7d564f82e
                  • MD5 SHA1 SHA512

                  RnwhbfhiO.bat

                  • Path C:\Users\Public\Libraries\RnwhbfhiO.bat
                  • Size 411B
                  • SHA256 5a11c5641c476891aa30e7ecfa57c2639f6827d8640061f73e9afec0adbbd7d2
                  • MD5 SHA1 SHA512

                  easinvoker.exe

                  • Path C:\Users\Public\Libraries\easinvoker.exe
                  • Size 128KB
                  • SHA256 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96
                  • MD5 SHA1 SHA512 SSDEEP

                  netutils.dll

                  • Path C:\Users\Public\Libraries\netutils.dll
                  • Size 108KB
                  • SHA256 35e4a45c3a3f42ef5d340e891e864bafc49e7e869c626bad456290c9cc888303
                  • MD5 SHA1 SHA512 SSDEEP

                  easinvoker.exe

                  • Path C:\Windows \System32\easinvoker.exe
                  • Size 128KB
                  • SHA256 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96
                  • MD5 SHA1 SHA512 SSDEEP

                  easinvoker.exe

                  • Path C:\Windows \System32\easinvoker.exe
                  • Size 128KB
                  • SHA256 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96
                  • MD5 SHA1 SHA512 SSDEEP

                  netutils.dll

                  • Path C:\Windows \System32\netutils.dll
                  • Size 108KB
                  • SHA256 35e4a45c3a3f42ef5d340e891e864bafc49e7e869c626bad456290c9cc888303
                  • MD5 SHA1 SHA512 SSDEEP

                  netutils.dll

                  • Path C:\Windows \System32\netutils.dll
                  • Size 108KB
                  • SHA256 35e4a45c3a3f42ef5d340e891e864bafc49e7e869c626bad456290c9cc888303
                  • MD5 SHA1 SHA512 SSDEEP

                  KDECO.bat

                  • Path C:\windows \system32\KDECO.bat
                  • Size 155B
                  • SHA256 37c59c8398279916cfce45f8c5e3431058248f5e3bef4d9f5c0f44a7d564f82e
                  • MD5 SHA1 SHA512

                  memory/1004-177-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-183-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-145-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-146-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-147-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-144-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-149-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-150-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-151-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-148-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-152-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-153-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-154-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-155-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-156-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-157-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-180-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-159-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-160-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-161-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-163-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-162-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-164-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-165-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-182-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-168-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-167-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-169-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-170-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-171-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-172-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-173-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-174-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-175-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-176-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-132-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-178-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-179-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-158-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-143-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-166-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-181-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-184-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-185-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-186-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-187-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-188-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-189-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-190-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-191-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-192-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-193-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-195-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-194-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-134-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-142-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-136-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-135-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-141-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-138-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-137-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-140-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1004-139-0x00000000022A0000-0x00000000022CA000-memory.dmp

                  memory/1688-367-0x0000000004600000-0x000000000467B000-memory.dmp

                  memory/1688-366-0x0000000010590000-0x000000001060E000-memory.dmp

                  memory/4012-272-0x0000014778B30000-0x0000014778B52000-memory.dmp

                  memory/4012-273-0x00007FFB8E480000-0x00007FFB8EF41000-memory.dmp

                  memory/4012-335-0x00007FFB8E480000-0x00007FFB8EF41000-memory.dmp